Page:American Seashells (1954).djvu/184

134 $1/2$ inch in length, moderately slender, semigloss finish and smooth. Color light to dark reddish brown with small, irregular spots of bluish white. Columella white; interior of aperture whitish brown. A common littoral species. Compare with L. planaxis.

$1/2$ to $3/4$ inch in length, usually badly eroded; grayish brown with bluish white spots and flecks. Characterized by the eroded, flattened area on the body whorl just beside the columella. Interior of aperture chocolate-brown with a white spiral band at the bottom. A common littoral, rock-loving species. Do not confuse with the smoother, higher-spired L. scutulata.

$3/4$ inch in length, solid, sharp lip, characterized by about a dozen strong spiral threads on the body whorl. Columella whitish. Shell dark grayish to rusty-brown; some with 2 or 3 wide spiral bands of whitish. A common littoral species of the north.

$1/2$ to $3/4$ inch in length. Shell rounded at the base. Several spiral rows of small, fairly sharp nodules on the whorls. Columella flattened, forming a slightly dished-out shelf. Color brownish gray. Operculum paucispiral. A common rock-dwelling species found near the high-tide line. Do not confuse with the extremely similar Echininus nodulosus Pfr. which has a multi-spiral operculum, and whose columella is not shelved. Erroneously listed in Johnsonia and other books as Tectarius tuberculatus Wood.